In the age of spiritual machines Ray Kurzweil in 2001 predicted:
By 2020, a $1,000 computer will match processing speed of the human brain — 20 billion calculations per second.
By 2030, it will simulate the brain power of a small village about 1,000 human minds.
By 2048, it will have the brain power of the entire population of the U.S.
I predict that within 20 to 30 years the computer will replace the …